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NEXT STEP

# sudo nano /etc/modprobe.d/alsa-base

and add this line to the end:

options snd-hda-intel model=6stack-dig

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pcm.hdmi  { 
type hw card 0
device 3
}

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vdr02 ~ # aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: AD198x Analog [AD198x Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: Intel [HDA Intel], device 1: AD198x Digital [AD198x Digital]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
vdr02 ~ #

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~$ aplay -l
**** Liste von PLAYBACK Geräten ****
Karte 0: SB [HDA ATI SB], Gerät 0: ALC888 Analog [ALC888 Analog]
  Untergeordnete Geräte: 1/1
  Untergeordnetes Gerät '0: subdevice #0
Karte 0: SB [HDA ATI SB], Gerät 1: ALC888 Digital [ALC888 Digital]
  Untergeordnete Geräte: 1/1
  Untergeordnetes Gerät '0: subdevice #0
Karte 1: HDMI [HDA ATI HDMI], Gerät 3: ATI HDMI [ATI HDMI]
  Untergeordnete Geräte: 1/1
  Untergeordnetes Gerät '0: subdevice #0

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aplay -Dplughw:1,3 -fcd testfile.wav

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pcm.hdmi  { 
        type hw
        card 1
        device 3
}

ctl.hdmi {
        type hw
}

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# Gerät für Monoausgabe
# string, default: default
audio.device.alsa_default_device:hdmi

# Gerät für Stereoausgabe
# string, default: plug:front:default
audio.device.alsa_front_device:hdmi

# ALSA Mixergerät
# string, default: PCM
#audio.device.alsa_mixer_name:PCM

# Lautsprecherplazierung
# { Mono 1.0  Stereo 2.0  Headphones 2.0  Stereo 2.1  Surround 3.0  Surround 4.0  Surround 4.1  Surround 5.0  Surround 5.1  Surround 6.0  Surround 6.1  Surround 7.1  Pass Through }, default: 1
audio.output.speaker_arrangement: Stereo 2.0

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# Heruntermischen zu Zweikanal Stereo Raumklang
# bool, default: 0
audio.a52.surround_downmix:1

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vdr02 ~ # aplay -L
default:CARD=Intel
    HDA Intel, AD198x Analog
    Default Audio Device
front:CARD=Intel,DEV=0
    HDA Intel, AD198x Analog
    Front speakers
surround40:CARD=Intel,DEV=0
    HDA Intel, AD198x Analog
    4.0 Surround output to Front and Rear speakers
surround41:CARD=Intel,DEV=0
    HDA Intel, AD198x Analog
    4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=Intel,DEV=0
    HDA Intel, AD198x Analog
    5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=Intel,DEV=0
    HDA Intel, AD198x Analog
    5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=Intel,DEV=0
    HDA Intel, AD198x Analog
    7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
iec958:CARD=Intel,DEV=0
    HDA Intel, AD198x Digital
    IEC958 (S/PDIF) Digital Audio Output
hdmi:CARD=Intel,DEV=0
    HDA Intel
    HDMI Audio Output
null
    Discard all samples (playback) or generate zero samples (capture)
vdr02 ~ #

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#>aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: ALC882 Analog [ALC882 Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: Intel [HDA Intel], device 1: ALC882 Digital [ALC882 Digital]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

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pcm.!default {
        type hw
	card 0
	device 1
}